jossrik :
DDR4 sounds like a lot of trouble to me, I really hope they get all of this settled when it hits mainstream motherboards and CPUs. It may just be me, but it seems like a lot of work for memory and not a lot of payoff. It doesn't even sound fun to play with if you don't have a stable place to start from. I can justify the extra money on the processor for a 6 core with hyperthreading, compared to the 4790K, I can even justify the extra money on the board. But the premium on memory right now just seems like a bad deal. Even the inexpensive DDR4 memory seems way too pricey at this point. I know, prices will come down as it becomes more mainstream. I know, slower memory is more stable right now. It's just that the rest of the stuff is high end, and the high end memory doesn't seem to be able to keep it's hands clean.
What's with all the gloom? I see a $50 price premium on 16GB kits, which is big, but if you already paid $50 more for the board it's probably not a deal breaker. And there are lots of kits that work correctly out of the box, all the way up to DDR4-2666. Add DDR4-3000 if you don't care about the 125 MHz BCLK change and all the CPU changes that go with it (you probably do care about those things, though), so still 2666.
And all major motherboard manufacturers are now optimizing for DDR4-3200 at stock BCLK, so it won't be long before you'll be able to select from 2400, 2666, and 3200 kits that operate normally out of the box. Heck, that's probably possible already, we just haven't gotten the right 3200 kits yet.